Shoe machine



. LMSES Mmm 13, i923.

H. MUSKIN sHE MACHINE Filed Dec. 5, 1920 Patented Mar. i3, i923.

@Ffillia HYMAN MUSKIN, OIF BALTIMORE, MARYLAND.

Sironi/resume.

Application filed December 3, 1920. Serial No. 427,959.

To all whom it may concern.'

Be it known that I-IYMAN MUSKIN, a citi- Zen of the United States ofAmerica, residing at Baltimore, State of Maryland, has invented new anduseful Improvements in Shoe Machines, of which the following is aspecification.

' The object of the invention is to provide means in connection withshoe sewing or stitching machines whereby the stitches may be formedperpendicular or substantially perpendicular to the plane of the shoesole and extended through the sole to the under or outer or wearingsurface thereof under such conditions as to provide for the embeddingand protection of the stitches or stitch elements at the outer orwearing surface against the effect of wear incident to the use of theshoe, and involving in that connection the formation in the out-er orwearing surface of the shoe sole of a groove in which the stitches maybe laid and protectively embedded; and in this connection to providemeans whereby the preparation of the outer sole member for the reception'of the stitching, and consisting for example in the surface groovingthereof, may be effected progressively as the sole is stitched in theformation of the shoe.

Moreover it is the object to provide a grooving means for operation uponthe exterior or wearing surface of the outer shoe sole member, in thepreparation thereof for the embedding reception of the stitch membersatthe outer or wea-ring surface of the sole, which will act totemporarily displace a sufficient portion of the material of the face ofthe shoe sole to allow for the reception and embedding of the stitches,and to hold the displaced portions thereof in a distended relationduring the laying of the stitches, to permit of the subsequentresumption by such portions of their former or original positions t0constitute a covering and protection for the stitches and pre-vent thewear incident to the use of the shoe from being applied to the stitches.

1With these and related objects in view as will appear in the course ofthe following description, the invention consists in a construction,combination and relation of parts of which a preferred embodiment isdisclosed in the accompanying drawing, it being understood that changesin form, proportion and details: may be resorte-d to within the scope ofthe appended claims without depart-ing from the principles involved.

In the drawing:-

Figure 1 is a plan view partly broken away of a shoe sewing machine,throat plate and feeder with which is associated a grooving meansconstructed in accordance with the invention.

Figure 2 is a longitudinal sectional view of the same on the planeindicated by the line 2 2 of Figure 1.

Figure 3 is an inverted plan view of the throat plate.

Figure 4 is a perspective view of the same.

Figures 5 and 6 are detail views respectively of the grooving carrierand bit, detached.

rIhe device embodying the invent-ion is illustrated in connection withthe feeder mechanism of a machine of that type wherein the needle hole,indicated at 10, is formed in one of the elements of the feeder of whichthe jaws 11 and 12, serrated as in the ordinary practice operate inslots 13 in the throat plate 14, and wherein the advance or work feedingmovement of the feeder, in the direction shown by the arrow in Figure 1occurs while the stitching needle is in its depressed position and is inengagement with the work.`

In cooperative relation with the feeder and in the illustratedembodiment of the invention actuated by the feeder is a shoe solegrooving means consisting essentially of a carrier 15 mounted forreciprocatory movement in timed relation with the feeder, and a bit 16supported by the carrier and preferably formed as an independent elementattachable thereto by means of a 1base plate 17 or the equivalentthereof held in place by retaining screws 18 or the equivalent thereof,to the end that the bit may be replaced or interchanged with others ofgraduated sizes, may be suitably tempered, and may be detached for thepurpose of sharpening the same and the like, said carrier being disposedin the path of the return movement of the feeder for repression therebyduring its return stroke, after having advanced the work for thereception ofthe succeeding stitch, van actuating spring 19 serving tomaintain the` indicated relation between the carrier andthe feeder andhence acting to advance the carrier during the forj ward movement of thefeeder.

The bit which is constructed to operate in a path parallel with thesurface of the throat plate and projects above the plane thereof adistance corresponding with the ydepth of the j proposed groove to beformed in the Linder surface of the shoe sole, is disposed for cuttingaction during the return movement of the feeder, and hence insuchrelation to the othei'parts of the lmechanism as to form the groove inthe shoe sole in advance of the formation of the stitches, but at suchashort distance in advance of the intersecting path of movement of theneedle as to serve as a means `of holding the side walls of the grooveformed bythe bit in a laterally displaced vor'distended relation `duringthe stitchforming operation of the needle, to insure the laying of thestitches in the groove, so that as the work further proceeds, and theside walls or displaced portions oi the shoe sole are relieved of thedistending action of the bit, said displaced walls iii rcturning totheir normal positions cover and conceal the stitches laid in the outersurface of the sole and interpose an appreciable thickness of the shoesole material between the stitches and the wearing surface to protectthey stitches from wear.

- The bit, it will be noted, is of cross sec-y tionally triangularforni, thus providing diverging sides terminating` at the cutting edge,the line of divergence being in the direction vof movement ofthe bit.Further, the upper end of the bit is beveled rearwardly to 'leave asharp point making for the easy initial penetration of the bit into thegoods at the beginning of the channeling operation,

the diverging side walls of the bit maintaining the distention of theslot oi' groove at the time of the laying of the stitches.

In the construction illustrated the carrier is mounted in `asuitableguide formed by a longitudinal channel 20 in the surface of the throatplate, spanned by a bridgev piece 2l, and a downturned ear 22 at the eX-tremity of the carrier supports a stud 23 with which one end of thespring 19 is engaged. Theother end of the spring is fitted in a socket24 in which is disposed a.

ingthe relation between the bit `and the carrier the lbase plate 17 oftheI former is `pref-I erably'provided at'the extremity adjacent toMentes the bitfwith a depending ear 26 for engagement with a seat 27 inthe adjacent" end of the carrier.

The invention having been described', what is claimed as new and usefulis z j .91. A shoe sole stitching mechanism having,y in combinationwith`the bed plate,

throat plate and feeder, av work channeling means `having a reciprocablebit carriermounted for sliding movement in a path parallel with the bedplate for forward and rearward move-ment with the feeder, a bit arrangedcloseV to and in the longitudinal plane of the needle for cut-tingaction during the return movement of the feeder, the bit i having ashank bearing upon the'upper-'sur-` face of the .carrier and providedwith a bearing-v ear for engaging thev ,front end thereof, and thecarrier having'-a'fdependingl ear for pressure by a bit actuatingspring.

2. A shoe sole stitching mechanism having in combination with the bedplate,th'roatl plate and feeder, a work channeling means having areciprocable bit-carrier mounted for sliding movement in a path parallelwith the bed plate 'for vforward and rearward movement' with-the feeder,a bit arranged" close to and in the longitudinal plane of they needleforcutting action during thel return movement of the feeder,'the carrierand bit plate having depending ears of which that on the bit plate bearsagainst the end of the carrier, and a spring bearing upon theear of thecarrier for maintaining the carrier in following rela-tion with rthefeeder,` and means for adjustingthe `tensiongof the` `spring' tocompensate forthe rapidity of` movement of the feeder.l

The combination Vwith a be'dplate, the throat "pla-te' and the feed dogof a sewing` ico machine; of a work-channelingv member o comprising asupporting plate slidably mounted beneath the throat plate land having atop channel, and a shank secured insaid channel andv having lanupstanding blade at its forward end, the throat'plate having abottomslotin which the supporting plate seats, a retaining plate forsaidsupportiiigf'plate extending across' ythe bottom thereof,`the throatvplate also fhaving an.;v opening through-which the bla-de protrudes,` jand the'forward end ofthe shank being'be'- 1 hind the feed dog toabutthereagainstto obtain a working stroke on the return stroke l' ofthe feed dog, a spring bearin'gagainst the rear end of the aforesaidsupporting member, a sockety for 'the spring mounted on the' bottom ofthe -bed plate, from which socket one end of the spring projectstoengage ythe supporting member, and an adjustable abutment in thesocket engaging the other end of the spring. y*

ln testimony whereof' heaiiiiies his signature. Y

HYMANk MUSKIN.

iio"

